/*!
 * Chart.js
 * http://chartjs.org/
 *
 * Copyright 2013 Nick Downie
 * Released under the MIT license
 * https://github.com/nnnick/Chart.js/blob/master/LICENSE.md
 */

//Define the global Chart Variable as a class.
window.Chart = function (context) {

    var chart = this;


    //Easing functions adapted from Robert Penner's easing equations
    //http://www.robertpenner.com/easing/

    var animationOptions = {
        linear: function (t) {
            return t;
        },
        easeInQuad: function (t) {
            return t * t;
        },
        easeOutQuad: function (t) {
            return -1 * t * (t - 2);
        },
        easeInOutQuad: function (t) {
            if ((t /= 1 / 2) < 1) return 1 / 2 * t * t;
            return -1 / 2 * ((--t) * (t - 2) - 1);
        },
        easeInCubic: function (t) {
            return t * t * t;
        },
        easeOutCubic: function (t) {
            return 1 * ((t = t / 1 - 1) * t * t + 1);
        },
        easeInOutCubic: function (t) {
            if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t;
            return 1 / 2 * ((t -= 2) * t * t + 2);
        },
        easeInQuart: function (t) {
            return t * t * t * t;
        },
        easeOutQuart: function (t) {
            return -1 * ((t = t / 1 - 1) * t * t * t - 1);
        },
        easeInOutQuart: function (t) {
            if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t;
            return -1 / 2 * ((t -= 2) * t * t * t - 2);
        },
        easeInQuint: function (t) {
            return 1 * (t /= 1) * t * t * t * t;
        },
        easeOutQuint: function (t) {
            return 1 * ((t = t / 1 - 1) * t * t * t * t + 1);
        },
        easeInOutQuint: function (t) {
            if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t * t;
            return 1 / 2 * ((t -= 2) * t * t * t * t + 2);
        },
        easeInSine: function (t) {
            return -1 * Math.cos(t / 1 * (Math.PI / 2)) + 1;
        },
        easeOutSine: function (t) {
            return 1 * Math.sin(t / 1 * (Math.PI / 2));
        },
        easeInOutSine: function (t) {
            return -1 / 2 * (Math.cos(Math.PI * t / 1) - 1);
        },
        easeInExpo: function (t) {
            return (t == 0) ? 1 : 1 * Math.pow(2, 10 * (t / 1 - 1));
        },
        easeOutExpo: function (t) {
            return (t == 1) ? 1 : 1 * (-Math.pow(2, -10 * t / 1) + 1);
        },
        easeInOutExpo: function (t) {
            if (t == 0) return 0;
            if (t == 1) return 1;
            if ((t /= 1 / 2) < 1) return 1 / 2 * Math.pow(2, 10 * (t - 1));
            return 1 / 2 * (-Math.pow(2, -10 * --t) + 2);
        },
        easeInCirc: function (t) {
            if (t >= 1) return t;
            return -1 * (Math.sqrt(1 - (t /= 1) * t) - 1);
        },
        easeOutCirc: function (t) {
            return 1 * Math.sqrt(1 - (t = t / 1 - 1) * t);
        },
        easeInOutCirc: function (t) {
            if ((t /= 1 / 2) < 1) return -1 / 2 * (Math.sqrt(1 - t * t) - 1);
            return 1 / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1);
        },
        easeInElastic: function (t) {
            var s = 1.70158;
            var p = 0;
            var a = 1;
            if (t == 0) return 0;
            if ((t /= 1) == 1) return 1;
            if (!p) p = 1 * .3;
            if (a < Math.abs(1)) {
                a = 1;
                var s = p / 4;
            } else var s = p / (2 * Math.PI) * Math.asin(1 / a);
            return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
        },
        easeOutElastic: function (t) {
            var s = 1.70158;
            var p = 0;
            var a = 1;
            if (t == 0) return 0;
            if ((t /= 1) == 1) return 1;
            if (!p) p = 1 * .3;
            if (a < Math.abs(1)) {
                a = 1;
                var s = p / 4;
            } else var s = p / (2 * Math.PI) * Math.asin(1 / a);
            return a * Math.pow(2, -10 * t) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) + 1;
        },
        easeInOutElastic: function (t) {
            var s = 1.70158;
            var p = 0;
            var a = 1;
            if (t == 0) return 0;
            if ((t /= 1 / 2) == 2) return 1;
            if (!p) p = 1 * (.3 * 1.5);
            if (a < Math.abs(1)) {
                a = 1;
                var s = p / 4;
            } else var s = p / (2 * Math.PI) * Math.asin(1 / a);
            if (t < 1) return -.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
            return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) * .5 + 1;
        },
        easeInBack: function (t) {
            var s = 1.70158;
            return 1 * (t /= 1) * t * ((s + 1) * t - s);
        },
        easeOutBack: function (t) {
            var s = 1.70158;
            return 1 * ((t = t / 1 - 1) * t * ((s + 1) * t + s) + 1);
        },
        easeInOutBack: function (t) {
            var s = 1.70158;
            if ((t /= 1 / 2) < 1) return 1 / 2 * (t * t * (((s *= (1.525)) + 1) * t - s));
            return 1 / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);
        },
        easeInBounce: function (t) {
            return 1 - animationOptions.easeOutBounce(1 - t);
        },
        easeOutBounce: function (t) {
            if ((t /= 1) < (1 / 2.75)) {
                return 1 * (7.5625 * t * t);
            } else if (t < (2 / 2.75)) {
                return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + .75);
            } else if (t < (2.5 / 2.75)) {
                return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + .9375);
            } else {
                return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375);
            }
        },
        easeInOutBounce: function (t) {
            if (t < 1 / 2) return animationOptions.easeInBounce(t * 2) * .5;
            return animationOptions.easeOutBounce(t * 2 - 1) * .5 + 1 * .5;
        }
    };

    //Variables global to the chart
    var width = context.canvas.width;
    var height = context.canvas.height;


    //High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
    if (window.devicePixelRatio) {
        context.canvas.style.width = width + "px";
        context.canvas.style.height = height + "px";
        context.canvas.height = height * window.devicePixelRatio;
        context.canvas.width = width * window.devicePixelRatio;
        context.scale(window.devicePixelRatio, window.devicePixelRatio);
    }

    this.PolarArea = function (data, options) {

        chart.PolarArea.defaults = {
            scaleOverlay: true,
            scaleOverride: false,
            scaleSteps: null,
            scaleStepWidth: null,
            scaleStartValue: null,
            scaleShowLine: true,
            scaleLineColor: "rgba(0,0,0,.1)",
            scaleLineWidth: 1,
            scaleShowLabels: true,
            scaleLabel: "<%=value%>",
            scaleFontFamily: "'Arial'",
            scaleFontSize: 12,
            scaleFontStyle: "normal",
            scaleFontColor: "#666",
            scaleShowLabelBackdrop: true,
            scaleBackdropColor: "rgba(255,255,255,0.75)",
            scaleBackdropPaddingY: 2,
            scaleBackdropPaddingX: 2,
            segmentShowStroke: true,
            segmentStrokeColor: "#fff",
            segmentStrokeWidth: 2,
            animation: true,
            animationSteps: 100,
            animationEasing: "easeOutBounce",
            animateRotate: true,
            animateScale: false,
            onAnimationComplete: null
        };

        var config = (options) ? mergeChartConfig(chart.PolarArea.defaults, options) : chart.PolarArea.defaults;

        return new PolarArea(data, config, context);
    };

    this.Radar = function (data, options) {

        chart.Radar.defaults = {
            scaleOverlay: false,
            scaleOverride: false,
            scaleSteps: null,
            scaleStepWidth: null,
            scaleStartValue: null,
            scaleShowLine: true,
            scaleLineColor: "rgba(0,0,0,.1)",
            scaleLineWidth: 1,
            scaleShowLabels: false,
            scaleLabel: "<%=value%>",
            scaleFontFamily: "'Arial'",
            scaleFontSize: 12,
            scaleFontStyle: "normal",
            scaleFontColor: "#666",
            scaleShowLabelBackdrop: true,
            scaleBackdropColor: "rgba(255,255,255,0.75)",
            scaleBackdropPaddingY: 2,
            scaleBackdropPaddingX: 2,
            angleShowLineOut: true,
            angleLineColor: "rgba(0,0,0,.1)",
            angleLineWidth: 1,
            pointLabelFontFamily: "'Arial'",
            pointLabelFontStyle: "normal",
            pointLabelFontSize: 12,
            pointLabelFontColor: "#666",
            pointDot: true,
            pointDotRadius: 3,
            pointDotStrokeWidth: 1,
            datasetStroke: true,
            datasetStrokeWidth: 2,
            datasetFill: true,
            animation: true,
            animationSteps: 60,
            animationEasing: "easeOutQuart",
            onAnimationComplete: null
        };

        var config = (options) ? mergeChartConfig(chart.Radar.defaults, options) : chart.Radar.defaults;

        return new Radar(data, config, context);
    };

    this.Pie = function (data, options) {
        chart.Pie.defaults = {
            segmentShowStroke: true,
            segmentStrokeColor: "#fff",
            segmentStrokeWidth: 2,
            animation: true,
            animationSteps: 100,
            animationEasing: "easeOutBounce",
            animateRotate: true,
            animateScale: false,
            onAnimationComplete: null
        };

        var config = (options) ? mergeChartConfig(chart.Pie.defaults, options) : chart.Pie.defaults;

        return new Pie(data, config, context);
    };

    this.Doughnut = function (data, options) {

        chart.Doughnut.defaults = {
            segmentShowStroke: true,
            segmentStrokeColor: "#fff",
            segmentStrokeWidth: 2,
            percentageInnerCutout: 50,
            animation: true,
            animationSteps: 100,
            animationEasing: "easeOutBounce",
            animateRotate: true,
            animateScale: false,
            onAnimationComplete: null
        };

        var config = (options) ? mergeChartConfig(chart.Doughnut.defaults, options) : chart.Doughnut.defaults;

        return new Doughnut(data, config, context);

    };

    this.Line = function (data, options) {

        chart.Line.defaults = {
            scaleOverlay: false,
            scaleOverride: false,
            scaleSteps: null,
            scaleStepWidth: null,
            scaleStartValue: null,
            scaleLineColor: "rgba(0,0,0,.1)",
            scaleLineWidth: 1,
            scaleShowLabels: true,
            scaleLabel: "<%=value%>",
            scaleFontFamily: "'Arial'",
            scaleFontSize: 12,
            scaleFontStyle: "normal",
            scaleFontColor: "#666",
            scaleShowGridLines: true,
            scaleGridLineColor: "rgba(0,0,0,.05)",
            scaleGridLineWidth: 1,
            bezierCurve: true,
            pointDot: true,
            pointDotRadius: 4,
            pointDotStrokeWidth: 2,
            datasetStroke: true,
            datasetStrokeWidth: 2,
            datasetFill: true,
            animation: true,
            animationSteps: 60,
            animationEasing: "easeOutQuart",
            onAnimationComplete: null
        };
        var config = (options) ? mergeChartConfig(chart.Line.defaults, options) : chart.Line.defaults;

        return new Line(data, config, context);
    }

    this.Bar = function (data, options) {
        chart.Bar.defaults = {
            scaleOverlay: false,
            scaleOverride: false,
            scaleSteps: null,
            scaleStepWidth: null,
            scaleStartValue: null,
            scaleLineColor: "rgba(0,0,0,.1)",
            scaleLineWidth: 1,
            scaleShowLabels: true,
            scaleLabel: "<%=value%>",
            scaleFontFamily: "'Arial'",
            scaleFontSize: 12,
            scaleFontStyle: "normal",
            scaleFontColor: "#666",
            scaleShowGridLines: true,
            scaleGridLineColor: "rgba(0,0,0,.05)",
            scaleGridLineWidth: 1,
            barShowStroke: true,
            barStrokeWidth: 2,
            barValueSpacing: 5,
            barDatasetSpacing: 1,
            animation: true,
            animationSteps: 60,
            animationEasing: "easeOutQuart",
            onAnimationComplete: null
        };
        var config = (options) ? mergeChartConfig(chart.Bar.defaults, options) : chart.Bar.defaults;

        return new Bar(data, config, context);
    }

    var clear = function (c) {
        c.clearRect(0, 0, width, height);
    };

    var PolarArea = function (data, config, ctx) {
        var maxSize, scaleHop, calculatedScale, labelHeight, scaleHeight, valueBounds, labelTemplateString;


        calculateDrawingSizes();

        valueBounds = getValueBounds();

        labelTemplateString = (config.scaleShowLabels) ? config.scaleLabel : null;

        //Check and set the scale
        if (!config.scaleOverride) {

            calculatedScale = calculateScale(scaleHeight, valueBounds.maxSteps, valueBounds.minSteps, valueBounds.maxValue, valueBounds.minValue, labelTemplateString);
        } else {
            calculatedScale = {
                steps: config.scaleSteps,
                stepValue: config.scaleStepWidth,
                graphMin: config.scaleStartValue,
                labels: []
            }
            populateLabels(labelTemplateString, calculatedScale.labels, calculatedScale.steps, config.scaleStartValue, config.scaleStepWidth);
        }

        scaleHop = maxSize / (calculatedScale.steps);

        //Wrap in an animation loop wrapper
        animationLoop(config, drawScale, drawAllSegments, ctx);

        function calculateDrawingSizes() {
            maxSize = (Min([width, height]) / 2);
            //Remove whatever is larger - the font size or line width.

            maxSize -= Max([config.scaleFontSize * 0.5, config.scaleLineWidth * 0.5]);

            labelHeight = config.scaleFontSize * 2;
            //If we're drawing the backdrop - add the Y padding to the label height and remove from drawing region.
            if (config.scaleShowLabelBackdrop) {
                labelHeight += (2 * config.scaleBackdropPaddingY);
                maxSize -= config.scaleBackdropPaddingY * 1.5;
            }

            scaleHeight = maxSize;
            //If the label height is less than 5, set it to 5 so we don't have lines on top of each other.
            labelHeight = Default(labelHeight, 5);
        }

        function drawScale() {
            for (var i = 0; i < calculatedScale.steps; i++) {
                //If the line object is there
                if (config.scaleShowLine) {
                    ctx.beginPath();
                    ctx.arc(width / 2, height / 2, scaleHop * (i + 1), 0, (Math.PI * 2), true);
                    ctx.strokeStyle = config.scaleLineColor;
                    ctx.lineWidth = config.scaleLineWidth;
                    ctx.stroke();
                }

                if (config.scaleShowLabels) {
                    ctx.textAlign = "center";
                    ctx.font = config.scaleFontStyle + " " + config.scaleFontSize + "px " + config.scaleFontFamily;
                    var label = calculatedScale.labels[i];
                    //If the backdrop object is within the font object
                    if (config.scaleShowLabelBackdrop) {
                        var textWidth = ctx.measureText(label).width;
                        ctx.fillStyle = config.scaleBackdropColor;
                        ctx.beginPath();
                        ctx.rect(
                            Math.round(width / 2 - textWidth / 2 - config.scaleBackdropPaddingX),     //X
                            Math.round(height / 2 - (scaleHop * (i + 1)) - config.scaleFontSize * 0.5 - config.scaleBackdropPaddingY),//Y
                            Math.round(textWidth + (config.scaleBackdropPaddingX * 2)), //Width
                            Math.round(config.scaleFontSize + (config.scaleBackdropPaddingY * 2)) //Height
                        );
                        ctx.fill();
                    }
                    ctx.textBaseline = "middle";
                    ctx.fillStyle = config.scaleFontColor;
                    ctx.fillText(label, width / 2, height / 2 - (scaleHop * (i + 1)));
                }
            }
        }

        function drawAllSegments(animationDecimal) {
            var startAngle = -Math.PI / 2,
                angleStep = (Math.PI * 2) / data.length,
                scaleAnimation = 1,
                rotateAnimation = 1;
            if (config.animation) {
                if (config.animateScale) {
                    scaleAnimation = animationDecimal;
                }
                if (config.animateRotate) {
                    rotateAnimation = animationDecimal;
                }
            }

            for (var i = 0; i < data.length; i++) {

                ctx.beginPath();
                ctx.arc(width / 2, height / 2, scaleAnimation * calculateOffset(data[i].value, calculatedScale, scaleHop), startAngle, startAngle + rotateAnimation * angleStep, false);
                ctx.lineTo(width / 2, height / 2);
                ctx.closePath();
                ctx.fillStyle = data[i].color;
                ctx.fill();

                if (config.segmentShowStroke) {
                    ctx.strokeStyle = config.segmentStrokeColor;
                    ctx.lineWidth = config.segmentStrokeWidth;
                    ctx.stroke();
                }
                startAngle += rotateAnimation * angleStep;
            }
        }

        function getValueBounds() {
            var upperValue = Number.MIN_VALUE;
            var lowerValue = Number.MAX_VALUE;
            for (var i = 0; i < data.length; i++) {
                if (data[i].value > upperValue) {
                    upperValue = data[i].value;
                }
                if (data[i].value < lowerValue) {
                    lowerValue = data[i].value;
                }
            }
            ;

            var maxSteps = Math.floor((scaleHeight / (labelHeight * 0.66)));
            var minSteps = Math.floor((scaleHeight / labelHeight * 0.5));

            return {
                maxValue: upperValue,
                minValue: lowerValue,
                maxSteps: maxSteps,
                minSteps: minSteps
            };


        }
    }

    var Radar = function (data, config, ctx) {
        var maxSize, scaleHop, calculatedScale, labelHeight, scaleHeight, valueBounds, labelTemplateString;

        //If no labels are defined set to an empty array, so referencing length for looping doesn't blow up.
        if (!data.labels) data.labels = [];

        calculateDrawingSizes();

        var valueBounds = getValueBounds();

        labelTemplateString = (config.scaleShowLabels) ? config.scaleLabel : null;

        //Check and set the scale
        if (!config.scaleOverride) {

            calculatedScale = calculateScale(scaleHeight, valueBounds.maxSteps, valueBounds.minSteps, valueBounds.maxValue, valueBounds.minValue, labelTemplateString);
        } else {
            calculatedScale = {
                steps: config.scaleSteps,
                stepValue: config.scaleStepWidth,
                graphMin: config.scaleStartValue,
                labels: []
            }
            populateLabels(labelTemplateString, calculatedScale.labels, calculatedScale.steps, config.scaleStartValue, config.scaleStepWidth);
        }

        scaleHop = maxSize / (calculatedScale.steps);

        animationLoop(config, drawScale, drawAllDataPoints, ctx);

        //Radar specific functions.
        function drawAllDataPoints(animationDecimal) {
            var rotationDegree = (2 * Math.PI) / data.datasets[0].data.length;

            ctx.save();
            //translate to the centre of the canvas.
            ctx.translate(width / 2, height / 2);

            //We accept multiple data sets for radar charts, so show loop through each set
            for (var i = 0; i < data.datasets.length; i++) {
                ctx.beginPath();

                ctx.moveTo(0, animationDecimal * (-1 * calculateOffset(data.datasets[i].data[0], calculatedScale, scaleHop)));
                for (var j = 1; j < data.datasets[i].data.length; j++) {
                    ctx.rotate(rotationDegree);
                    ctx.lineTo(0, animationDecimal * (-1 * calculateOffset(data.datasets[i].data[j], calculatedScale, scaleHop)));

                }
                ctx.closePath();


                ctx.fillStyle = data.datasets[i].fillColor;
                ctx.strokeStyle = data.datasets[i].strokeColor;
                ctx.lineWidth = config.datasetStrokeWidth;
                ctx.fill();
                ctx.stroke();


                if (config.pointDot) {
                    ctx.fillStyle = data.datasets[i].pointColor;
                    ctx.strokeStyle = data.datasets[i].pointStrokeColor;
                    ctx.lineWidth = config.pointDotStrokeWidth;
                    for (var k = 0; k < data.datasets[i].data.length; k++) {
                        ctx.rotate(rotationDegree);
                        ctx.beginPath();
                        ctx.arc(0, animationDecimal * (-1 * calculateOffset(data.datasets[i].data[k], calculatedScale, scaleHop)), config.pointDotRadius, 2 * Math.PI, false);
                        ctx.fill();
                        ctx.stroke();
                    }

                }
                ctx.rotate(rotationDegree);

            }
            ctx.restore();


        }

        function drawScale() {
            var rotationDegree = (2 * Math.PI) / data.datasets[0].data.length;
            ctx.save();
            ctx.translate(width / 2, height / 2);

            if (config.angleShowLineOut) {
                ctx.strokeStyle = config.angleLineColor;
                ctx.lineWidth = config.angleLineWidth;
                for (var h = 0; h < data.datasets[0].data.length; h++) {

                    ctx.rotate(rotationDegree);
                    ctx.beginPath();
                    ctx.moveTo(0, 0);
                    ctx.lineTo(0, -maxSize);
                    ctx.stroke();
                }
            }

            for (var i = 0; i < calculatedScale.steps; i++) {
                ctx.beginPath();

                if (config.scaleShowLine) {
                    ctx.strokeStyle = config.scaleLineColor;
                    ctx.lineWidth = config.scaleLineWidth;
                    ctx.moveTo(0, -scaleHop * (i + 1));
                    for (var j = 0; j < data.datasets[0].data.length; j++) {
                        ctx.rotate(rotationDegree);
                        ctx.lineTo(0, -scaleHop * (i + 1));
                    }
                    ctx.closePath();
                    ctx.stroke();

                }

                if (config.scaleShowLabels) {
                    ctx.textAlign = 'center';
                    ctx.font = config.scaleFontStyle + " " + config.scaleFontSize + "px " + config.scaleFontFamily;
                    ctx.textBaseline = "middle";

                    if (config.scaleShowLabelBackdrop) {
                        var textWidth = ctx.measureText(calculatedScale.labels[i]).width;
                        ctx.fillStyle = config.scaleBackdropColor;
                        ctx.beginPath();
                        ctx.rect(
                            Math.round(-textWidth / 2 - config.scaleBackdropPaddingX),     //X
                            Math.round((-scaleHop * (i + 1)) - config.scaleFontSize * 0.5 - config.scaleBackdropPaddingY),//Y
                            Math.round(textWidth + (config.scaleBackdropPaddingX * 2)), //Width
                            Math.round(config.scaleFontSize + (config.scaleBackdropPaddingY * 2)) //Height
                        );
                        ctx.fill();
                    }
                    ctx.fillStyle = config.scaleFontColor;
                    ctx.fillText(calculatedScale.labels[i], 0, -scaleHop * (i + 1));
                }

            }
            for (var k = 0; k < data.labels.length; k++) {
                ctx.font = config.pointLabelFontStyle + " " + config.pointLabelFontSize + "px " + config.pointLabelFontFamily;
                ctx.fillStyle = config.pointLabelFontColor;
                var opposite = Math.sin(rotationDegree * k) * (maxSize + config.pointLabelFontSize);
                var adjacent = Math.cos(rotationDegree * k) * (maxSize + config.pointLabelFontSize);

                if (rotationDegree * k == Math.PI || rotationDegree * k == 0) {
                    ctx.textAlign = "center";
                } else if (rotationDegree * k > Math.PI) {
                    ctx.textAlign = "right";
                } else {
                    ctx.textAlign = "left";
                }

                ctx.textBaseline = "middle";

                ctx.fillText(data.labels[k], opposite, -adjacent);

            }
            ctx.restore();
        };

        function calculateDrawingSizes() {
            maxSize = (Min([width, height]) / 2);

            labelHeight = config.scaleFontSize * 2;

            var labelLength = 0;
            for (var i = 0; i < data.labels.length; i++) {
                ctx.font = config.pointLabelFontStyle + " " + config.pointLabelFontSize + "px " + config.pointLabelFontFamily;
                var textMeasurement = ctx.measureText(data.labels[i]).width;
                if (textMeasurement > labelLength) labelLength = textMeasurement;
            }

            //Figure out whats the largest - the height of the text or the width of what's there, and minus it from the maximum usable size.
            maxSize -= Max([labelLength, ((config.pointLabelFontSize / 2) * 1.5)]);

            maxSize -= config.pointLabelFontSize;
            maxSize = CapValue(maxSize, null, 0);
            scaleHeight = maxSize;
            //If the label height is less than 5, set it to 5 so we don't have lines on top of each other.
            labelHeight = Default(labelHeight, 5);
        };

        function getValueBounds() {
            var upperValue = Number.MIN_VALUE;
            var lowerValue = Number.MAX_VALUE;

            for (var i = 0; i < data.datasets.length; i++) {
                for (var j = 0; j < data.datasets[i].data.length; j++) {
                    if (data.datasets[i].data[j] > upperValue) {
                        upperValue = data.datasets[i].data[j]
                    }
                    if (data.datasets[i].data[j] < lowerValue) {
                        lowerValue = data.datasets[i].data[j]
                    }
                }
            }

            var maxSteps = Math.floor((scaleHeight / (labelHeight * 0.66)));
            var minSteps = Math.floor((scaleHeight / labelHeight * 0.5));

            return {
                maxValue: upperValue,
                minValue: lowerValue,
                maxSteps: maxSteps,
                minSteps: minSteps
            };


        }
    }

    var Pie = function (data, config, ctx) {
        var segmentTotal = 0;

        //In case we have a canvas that is not a square. Minus 5 pixels as padding round the edge.
        var pieRadius = Min([height / 2, width / 2]) - 5;

        for (var i = 0; i < data.length; i++) {
            segmentTotal += data[i].value;
        }


        animationLoop(config, null, drawPieSegments, ctx);

        function drawPieSegments(animationDecimal) {
            var cumulativeAngle = -Math.PI / 2,
                scaleAnimation = 1,
                rotateAnimation = 1;
            if (config.animation) {
                if (config.animateScale) {
                    scaleAnimation = animationDecimal;
                }
                if (config.animateRotate) {
                    rotateAnimation = animationDecimal;
                }
            }
            for (var i = 0; i < data.length; i++) {
                var segmentAngle = rotateAnimation * ((data[i].value / segmentTotal) * (Math.PI * 2));
                ctx.beginPath();
                ctx.arc(width / 2, height / 2, scaleAnimation * pieRadius, cumulativeAngle, cumulativeAngle + segmentAngle);
                ctx.lineTo(width / 2, height / 2);
                ctx.closePath();
                ctx.fillStyle = data[i].color;
                ctx.fill();

                if (config.segmentShowStroke) {
                    ctx.lineWidth = config.segmentStrokeWidth;
                    ctx.strokeStyle = config.segmentStrokeColor;
                    ctx.stroke();
                }
                cumulativeAngle += segmentAngle;
            }
        }
    }

    var Doughnut = function (data, config, ctx) {
        var segmentTotal = 0;

        //In case we have a canvas that is not a square. Minus 5 pixels as padding round the edge.
        var doughnutRadius = Min([height / 2, width / 2]) - 5;

        var cutoutRadius = doughnutRadius * (config.percentageInnerCutout / 100);

        for (var i = 0; i < data.length; i++) {
            segmentTotal += data[i].value;
        }


        animationLoop(config, null, drawPieSegments, ctx);


        function drawPieSegments(animationDecimal) {
            var cumulativeAngle = -Math.PI / 2,
                scaleAnimation = 1,
                rotateAnimation = 1;
            if (config.animation) {
                if (config.animateScale) {
                    scaleAnimation = animationDecimal;
                }
                if (config.animateRotate) {
                    rotateAnimation = animationDecimal;
                }
            }
            for (var i = 0; i < data.length; i++) {
                var segmentAngle = rotateAnimation * ((data[i].value / segmentTotal) * (Math.PI * 2));
                ctx.beginPath();
                ctx.arc(width / 2, height / 2, scaleAnimation * doughnutRadius, cumulativeAngle, cumulativeAngle + segmentAngle, false);
                ctx.arc(width / 2, height / 2, scaleAnimation * cutoutRadius, cumulativeAngle + segmentAngle, cumulativeAngle, true);
                ctx.closePath();
                ctx.fillStyle = data[i].color;
                ctx.fill();

                if (config.segmentShowStroke) {
                    ctx.lineWidth = config.segmentStrokeWidth;
                    ctx.strokeStyle = config.segmentStrokeColor;
                    ctx.stroke();
                }
                cumulativeAngle += segmentAngle;
            }
        }


    }

    var Line = function (data, config, ctx) {
        var maxSize, scaleHop, calculatedScale, labelHeight, scaleHeight, valueBounds, labelTemplateString, valueHop,
            widestXLabel, xAxisLength, yAxisPosX, xAxisPosY, rotateLabels = 0;

        calculateDrawingSizes();

        valueBounds = getValueBounds();
        //Check and set the scale
        labelTemplateString = (config.scaleShowLabels) ? config.scaleLabel : "";
        if (!config.scaleOverride) {

            calculatedScale = calculateScale(scaleHeight, valueBounds.maxSteps, valueBounds.minSteps, valueBounds.maxValue, valueBounds.minValue, labelTemplateString);
        } else {
            calculatedScale = {
                steps: config.scaleSteps,
                stepValue: config.scaleStepWidth,
                graphMin: config.scaleStartValue,
                labels: []
            }
            populateLabels(labelTemplateString, calculatedScale.labels, calculatedScale.steps, config.scaleStartValue, config.scaleStepWidth);
        }

        scaleHop = Math.floor(scaleHeight / calculatedScale.steps);
        calculateXAxisSize();
        animationLoop(config, drawScale, drawLines, ctx);

        function drawLines(animPc) {
            for (var i = 0; i < data.datasets.length; i++) {
                ctx.strokeStyle = data.datasets[i].strokeColor;
                ctx.lineWidth = config.datasetStrokeWidth;
                ctx.beginPath();
                ctx.moveTo(yAxisPosX, xAxisPosY - animPc * (calculateOffset(data.datasets[i].data[0], calculatedScale, scaleHop)))

                for (var j = 1; j < data.datasets[i].data.length; j++) {
                    if (config.bezierCurve) {
                        ctx.bezierCurveTo(xPos(j - 0.5), yPos(i, j - 1), xPos(j - 0.5), yPos(i, j), xPos(j), yPos(i, j));
                    } else {
                        ctx.lineTo(xPos(j), yPos(i, j));
                    }
                }
                ctx.stroke();
                if (config.datasetFill) {
                    ctx.lineTo(yAxisPosX + (valueHop * (data.datasets[i].data.length - 1)), xAxisPosY);
                    ctx.lineTo(yAxisPosX, xAxisPosY);
                    ctx.closePath();
                    ctx.fillStyle = data.datasets[i].fillColor;
                    ctx.fill();
                } else {
                    ctx.closePath();
                }
                if (config.pointDot) {
                    ctx.fillStyle = data.datasets[i].pointColor;
                    ctx.strokeStyle = data.datasets[i].pointStrokeColor;
                    ctx.lineWidth = config.pointDotStrokeWidth;
                    for (var k = 0; k < data.datasets[i].data.length; k++) {
                        ctx.beginPath();
                        ctx.arc(yAxisPosX + (valueHop * k), xAxisPosY - animPc * (calculateOffset(data.datasets[i].data[k], calculatedScale, scaleHop)), config.pointDotRadius, 0, Math.PI * 2, true);
                        ctx.fill();
                        ctx.stroke();
                    }
                }
            }

            function yPos(dataSet, iteration) {
                return xAxisPosY - animPc * (calculateOffset(data.datasets[dataSet].data[iteration], calculatedScale, scaleHop));
            }

            function xPos(iteration) {
                return yAxisPosX + (valueHop * iteration);
            }
        }

        function drawScale() {
            //X axis line
            ctx.lineWidth = config.scaleLineWidth;
            ctx.strokeStyle = config.scaleLineColor;
            ctx.beginPath();
            ctx.moveTo(width - widestXLabel / 2 + 5, xAxisPosY);
            ctx.lineTo(width - (widestXLabel / 2) - xAxisLength - 5, xAxisPosY);
            ctx.stroke();


            if (rotateLabels > 0) {
                ctx.save();
                ctx.textAlign = "right";
            } else {
                ctx.textAlign = "center";
            }
            ctx.fillStyle = config.scaleFontColor;
            for (var i = 0; i < data.labels.length; i++) {
                ctx.save();
                if (rotateLabels > 0) {
                    ctx.translate(yAxisPosX + i * valueHop, xAxisPosY + config.scaleFontSize);
                    ctx.rotate(-(rotateLabels * (Math.PI / 180)));
                    ctx.fillText(data.labels[i], 0, 0);
                    ctx.restore();
                } else {
                    ctx.fillText(data.labels[i], yAxisPosX + i * valueHop, xAxisPosY + config.scaleFontSize + 3);
                }

                ctx.beginPath();
                ctx.moveTo(yAxisPosX + i * valueHop, xAxisPosY + 3);

                //Check i isnt 0, so we dont go over the Y axis twice.
                if (config.scaleShowGridLines && i > 0) {
                    ctx.lineWidth = config.scaleGridLineWidth;
                    ctx.strokeStyle = config.scaleGridLineColor;
                    ctx.lineTo(yAxisPosX + i * valueHop, 5);
                } else {
                    ctx.lineTo(yAxisPosX + i * valueHop, xAxisPosY + 3);
                }
                ctx.stroke();
            }

            //Y axis
            ctx.lineWidth = config.scaleLineWidth;
            ctx.strokeStyle = config.scaleLineColor;
            ctx.beginPath();
            ctx.moveTo(yAxisPosX, xAxisPosY + 5);
            ctx.lineTo(yAxisPosX, 5);
            ctx.stroke();

            ctx.textAlign = "right";
            ctx.textBaseline = "middle";
            for (var j = 0; j < calculatedScale.steps; j++) {
                ctx.beginPath();
                ctx.moveTo(yAxisPosX - 3, xAxisPosY - ((j + 1) * scaleHop));
                if (config.scaleShowGridLines) {
                    ctx.lineWidth = config.scaleGridLineWidth;
                    ctx.strokeStyle = config.scaleGridLineColor;
                    ctx.lineTo(yAxisPosX + xAxisLength + 5, xAxisPosY - ((j + 1) * scaleHop));
                } else {
                    ctx.lineTo(yAxisPosX - 0.5, xAxisPosY - ((j + 1) * scaleHop));
                }

                ctx.stroke();

                if (config.scaleShowLabels) {
                    ctx.fillText(calculatedScale.labels[j], yAxisPosX - 8, xAxisPosY - ((j + 1) * scaleHop));
                }
            }


        }

        function calculateXAxisSize() {
            var longestText = 1;
            //if we are showing the labels
            if (config.scaleShowLabels) {
                ctx.font = config.scaleFontStyle + " " + config.scaleFontSize + "px " + config.scaleFontFamily;
                for (var i = 0; i < calculatedScale.labels.length; i++) {
                    var measuredText = ctx.measureText(calculatedScale.labels[i]).width;
                    longestText = (measuredText > longestText) ? measuredText : longestText;
                }
                //Add a little extra padding from the y axis
                longestText += 10;
            }
            xAxisLength = width - longestText - widestXLabel;
            valueHop = Math.floor(xAxisLength / (data.labels.length - 1));

            yAxisPosX = width - widestXLabel / 2 - xAxisLength;
            xAxisPosY = scaleHeight + config.scaleFontSize / 2;
        }

        function calculateDrawingSizes() {
            maxSize = height;

            //Need to check the X axis first - measure the length of each text metric, and figure out if we need to rotate by 45 degrees.
            ctx.font = config.scaleFontStyle + " " + config.scaleFontSize + "px " + config.scaleFontFamily;
            widestXLabel = 1;
            for (var i = 0; i < data.labels.length; i++) {
                var textLength = ctx.measureText(data.labels[i]).width;
                //If the text length is longer - make that equal to longest text!
                widestXLabel = (textLength > widestXLabel) ? textLength : widestXLabel;
            }
            if (width / data.labels.length < widestXLabel) {
                rotateLabels = 45;
                if (width / data.labels.length < Math.cos(rotateLabels) * widestXLabel) {
                    rotateLabels = 90;
                    maxSize -= widestXLabel;
                } else {
                    maxSize -= Math.sin(rotateLabels) * widestXLabel;
                }
            } else {
                maxSize -= config.scaleFontSize;
            }

            //Add a little padding between the x line and the text
            maxSize -= 5;


            labelHeight = config.scaleFontSize;

            maxSize -= labelHeight;
            //Set 5 pixels greater than the font size to allow for a little padding from the X axis.

            scaleHeight = maxSize;

            //Then get the area above we can safely draw on.

        }

        function getValueBounds() {
            var upperValue = Number.MIN_VALUE;
            var lowerValue = Number.MAX_VALUE;
            for (var i = 0; i < data.datasets.length; i++) {
                for (var j = 0; j < data.datasets[i].data.length; j++) {
                    if (data.datasets[i].data[j] > upperValue) {
                        upperValue = data.datasets[i].data[j]
                    }
                    ;
                    if (data.datasets[i].data[j] < lowerValue) {
                        lowerValue = data.datasets[i].data[j]
                    }
                    ;
                }
            }
            ;

            var maxSteps = Math.floor((scaleHeight / (labelHeight * 0.66)));
            var minSteps = Math.floor((scaleHeight / labelHeight * 0.5));

            return {
                maxValue: upperValue,
                minValue: lowerValue,
                maxSteps: maxSteps,
                minSteps: minSteps
            };


        }


    }

    var Bar = function (data, config, ctx) {
        var maxSize, scaleHop, calculatedScale, labelHeight, scaleHeight, valueBounds, labelTemplateString, valueHop,
            widestXLabel, xAxisLength, yAxisPosX, xAxisPosY, barWidth, rotateLabels = 0;

        calculateDrawingSizes();

        valueBounds = getValueBounds();
        //Check and set the scale
        labelTemplateString = (config.scaleShowLabels) ? config.scaleLabel : "";
        if (!config.scaleOverride) {

            calculatedScale = calculateScale(scaleHeight, valueBounds.maxSteps, valueBounds.minSteps, valueBounds.maxValue, valueBounds.minValue, labelTemplateString);
        } else {
            calculatedScale = {
                steps: config.scaleSteps,
                stepValue: config.scaleStepWidth,
                graphMin: config.scaleStartValue,
                labels: []
            }
            populateLabels(labelTemplateString, calculatedScale.labels, calculatedScale.steps, config.scaleStartValue, config.scaleStepWidth);
        }

        scaleHop = Math.floor(scaleHeight / calculatedScale.steps);
        calculateXAxisSize();
        animationLoop(config, drawScale, drawBars, ctx);

        function drawBars(animPc) {
            ctx.lineWidth = config.barStrokeWidth;
            for (var i = 0; i < data.datasets.length; i++) {
                ctx.fillStyle = data.datasets[i].fillColor;
                ctx.strokeStyle = data.datasets[i].strokeColor;
                for (var j = 0; j < data.datasets[i].data.length; j++) {
                    var barOffset = yAxisPosX + config.barValueSpacing + valueHop * j + barWidth * i + config.barDatasetSpacing * i + config.barStrokeWidth * i;

                    ctx.beginPath();
                    ctx.moveTo(barOffset, xAxisPosY);
                    ctx.lineTo(barOffset, xAxisPosY - animPc * calculateOffset(data.datasets[i].data[j], calculatedScale, scaleHop) + (config.barStrokeWidth / 2));
                    ctx.lineTo(barOffset + barWidth, xAxisPosY - animPc * calculateOffset(data.datasets[i].data[j], calculatedScale, scaleHop) + (config.barStrokeWidth / 2));
                    ctx.lineTo(barOffset + barWidth, xAxisPosY);
                    if (config.barShowStroke) {
                        ctx.stroke();
                    }
                    ctx.closePath();
                    ctx.fill();
                }
            }

        }

        function drawScale() {
            //X axis line
            ctx.lineWidth = config.scaleLineWidth;
            ctx.strokeStyle = config.scaleLineColor;
            ctx.beginPath();
            ctx.moveTo(width - widestXLabel / 2 + 5, xAxisPosY);
            ctx.lineTo(width - (widestXLabel / 2) - xAxisLength - 5, xAxisPosY);
            ctx.stroke();


            if (rotateLabels > 0) {
                ctx.save();
                ctx.textAlign = "right";
            } else {
                ctx.textAlign = "center";
            }
            ctx.fillStyle = config.scaleFontColor;
            for (var i = 0; i < data.labels.length; i++) {
                ctx.save();
                if (rotateLabels > 0) {
                    ctx.translate(yAxisPosX + i * valueHop, xAxisPosY + config.scaleFontSize);
                    ctx.rotate(-(rotateLabels * (Math.PI / 180)));
                    ctx.fillText(data.labels[i], 0, 0);
                    ctx.restore();
                } else {
                    ctx.fillText(data.labels[i], yAxisPosX + i * valueHop + valueHop / 2, xAxisPosY + config.scaleFontSize + 3);
                }

                ctx.beginPath();
                ctx.moveTo(yAxisPosX + (i + 1) * valueHop, xAxisPosY + 3);

                //Check i isnt 0, so we dont go over the Y axis twice.
                ctx.lineWidth = config.scaleGridLineWidth;
                ctx.strokeStyle = config.scaleGridLineColor;
                ctx.lineTo(yAxisPosX + (i + 1) * valueHop, 5);
                ctx.stroke();
            }

            //Y axis
            ctx.lineWidth = config.scaleLineWidth;
            ctx.strokeStyle = config.scaleLineColor;
            ctx.beginPath();
            ctx.moveTo(yAxisPosX, xAxisPosY + 5);
            ctx.lineTo(yAxisPosX, 5);
            ctx.stroke();

            ctx.textAlign = "right";
            ctx.textBaseline = "middle";
            for (var j = 0; j < calculatedScale.steps; j++) {
                ctx.beginPath();
                ctx.moveTo(yAxisPosX - 3, xAxisPosY - ((j + 1) * scaleHop));
                if (config.scaleShowGridLines) {
                    ctx.lineWidth = config.scaleGridLineWidth;
                    ctx.strokeStyle = config.scaleGridLineColor;
                    ctx.lineTo(yAxisPosX + xAxisLength + 5, xAxisPosY - ((j + 1) * scaleHop));
                } else {
                    ctx.lineTo(yAxisPosX - 0.5, xAxisPosY - ((j + 1) * scaleHop));
                }

                ctx.stroke();
                if (config.scaleShowLabels) {
                    ctx.fillText(calculatedScale.labels[j], yAxisPosX - 8, xAxisPosY - ((j + 1) * scaleHop));
                }
            }


        }

        function calculateXAxisSize() {
            var longestText = 1;
            //if we are showing the labels
            if (config.scaleShowLabels) {
                ctx.font = config.scaleFontStyle + " " + config.scaleFontSize + "px " + config.scaleFontFamily;
                for (var i = 0; i < calculatedScale.labels.length; i++) {
                    var measuredText = ctx.measureText(calculatedScale.labels[i]).width;
                    longestText = (measuredText > longestText) ? measuredText : longestText;
                }
                //Add a little extra padding from the y axis
                longestText += 10;
            }
            xAxisLength = width - longestText - widestXLabel;
            valueHop = Math.floor(xAxisLength / (data.labels.length));

            barWidth = (valueHop - config.scaleGridLineWidth * 2 - (config.barValueSpacing * 2) - (config.barDatasetSpacing * data.datasets.length - 1) - ((config.barStrokeWidth / 2) * data.datasets.length - 1)) / data.datasets.length;

            yAxisPosX = width - widestXLabel / 2 - xAxisLength;
            xAxisPosY = scaleHeight + config.scaleFontSize / 2;
        }

        function calculateDrawingSizes() {
            maxSize = height;

            //Need to check the X axis first - measure the length of each text metric, and figure out if we need to rotate by 45 degrees.
            ctx.font = config.scaleFontStyle + " " + config.scaleFontSize + "px " + config.scaleFontFamily;
            widestXLabel = 1;
            for (var i = 0; i < data.labels.length; i++) {
                var textLength = ctx.measureText(data.labels[i]).width;
                //If the text length is longer - make that equal to longest text!
                widestXLabel = (textLength > widestXLabel) ? textLength : widestXLabel;
            }
            if (width / data.labels.length < widestXLabel) {
                rotateLabels = 45;
                if (width / data.labels.length < Math.cos(rotateLabels) * widestXLabel) {
                    rotateLabels = 90;
                    maxSize -= widestXLabel;
                } else {
                    maxSize -= Math.sin(rotateLabels) * widestXLabel;
                }
            } else {
                maxSize -= config.scaleFontSize;
            }

            //Add a little padding between the x line and the text
            maxSize -= 5;


            labelHeight = config.scaleFontSize;

            maxSize -= labelHeight;
            //Set 5 pixels greater than the font size to allow for a little padding from the X axis.

            scaleHeight = maxSize;

            //Then get the area above we can safely draw on.

        }

        function getValueBounds() {
            var upperValue = Number.MIN_VALUE;
            var lowerValue = Number.MAX_VALUE;
            for (var i = 0; i < data.datasets.length; i++) {
                for (var j = 0; j < data.datasets[i].data.length; j++) {
                    if (data.datasets[i].data[j] > upperValue) {
                        upperValue = data.datasets[i].data[j]
                    }
                    ;
                    if (data.datasets[i].data[j] < lowerValue) {
                        lowerValue = data.datasets[i].data[j]
                    }
                    ;
                }
            }
            ;

            var maxSteps = Math.floor((scaleHeight / (labelHeight * 0.66)));
            var minSteps = Math.floor((scaleHeight / labelHeight * 0.5));

            return {
                maxValue: upperValue,
                minValue: lowerValue,
                maxSteps: maxSteps,
                minSteps: minSteps
            };


        }
    }

    function calculateOffset(val, calculatedScale, scaleHop) {
        var outerValue = calculatedScale.steps * calculatedScale.stepValue;
        var adjustedValue = val - calculatedScale.graphMin;
        var scalingFactor = CapValue(adjustedValue / outerValue, 1, 0);
        return (scaleHop * calculatedScale.steps) * scalingFactor;
    }

    function animationLoop(config, drawScale, drawData, ctx) {
        var animFrameAmount = (config.animation) ? 1 / CapValue(config.animationSteps, Number.MAX_VALUE, 1) : 1,
            easingFunction = animationOptions[config.animationEasing],
            percentAnimComplete = (config.animation) ? 0 : 1;


        if (typeof drawScale !== "function") drawScale = function () {
        };

        requestAnimFrame(animLoop);

        function animateFrame() {
            var easeAdjustedAnimationPercent = (config.animation) ? CapValue(easingFunction(percentAnimComplete), null, 0) : 1;
            clear(ctx);
            if (config.scaleOverlay) {
                drawData(easeAdjustedAnimationPercent);
                drawScale();
            } else {
                drawScale();
                drawData(easeAdjustedAnimationPercent);
            }
        }

        function animLoop() {
            //We need to check if the animation is incomplete (less than 1), or complete (1).
            percentAnimComplete += animFrameAmount;
            animateFrame();
            //Stop the loop continuing forever
            if (percentAnimComplete <= 1) {
                requestAnimFrame(animLoop);
            } else {
                if (typeof config.onAnimationComplete == "function") config.onAnimationComplete();
            }

        }

    }

    //Declare global functions to be called within this namespace here.


    // shim layer with setTimeout fallback
    var requestAnimFrame = (function () {
        return window.requestAnimationFrame ||
            window.webkitRequestAnimationFrame ||
            window.mozRequestAnimationFrame ||
            window.oRequestAnimationFrame ||
            window.msRequestAnimationFrame ||
            function (callback) {
                window.setTimeout(callback, 1000 / 60);
            };
    })();

    function calculateScale(drawingHeight, maxSteps, minSteps, maxValue, minValue, labelTemplateString) {
        var graphMin, graphMax, graphRange, stepValue, numberOfSteps, valueRange, rangeOrderOfMagnitude, decimalNum;

        valueRange = maxValue - minValue;

        rangeOrderOfMagnitude = calculateOrderOfMagnitude(valueRange);

        graphMin = Math.floor(minValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude);

        graphMax = Math.ceil(maxValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude);

        graphRange = graphMax - graphMin;

        stepValue = Math.pow(10, rangeOrderOfMagnitude);

        numberOfSteps = Math.round(graphRange / stepValue);

        //Compare number of steps to the max and min for that size graph, and add in half steps if need be.
        while (numberOfSteps < minSteps || numberOfSteps > maxSteps) {
            if (numberOfSteps < minSteps) {
                stepValue /= 2;
                numberOfSteps = Math.round(graphRange / stepValue);
            } else {
                stepValue *= 2;
                numberOfSteps = Math.round(graphRange / stepValue);
            }
        }
        ;

        var labels = [];
        populateLabels(labelTemplateString, labels, numberOfSteps, graphMin, stepValue);

        return {
            steps: numberOfSteps,
            stepValue: stepValue,
            graphMin: graphMin,
            labels: labels

        }

        function calculateOrderOfMagnitude(val) {
            return Math.floor(Math.log(val) / Math.LN10);
        }


    }

    //Populate an array of all the labels by interpolating the string.
    function populateLabels(labelTemplateString, labels, numberOfSteps, graphMin, stepValue) {
        if (labelTemplateString) {
            //Fix floating point errors by setting to fixed the on the same decimal as the stepValue.
            for (var i = 1; i < numberOfSteps + 1; i++) {
                labels.push(tmpl(labelTemplateString, {value: (graphMin + (stepValue * i)).toFixed(getDecimalPlaces(stepValue))}));
            }
        }
    }

    //Max value from array
    function Max(array) {
        return Math.max.apply(Math, array);
    };

    //Min value from array
    function Min(array) {
        return Math.min.apply(Math, array);
    };

    //Default if undefined
    function Default(userDeclared, valueIfFalse) {
        if (!userDeclared) {
            return valueIfFalse;
        } else {
            return userDeclared;
        }
    };

    //Is a number function
    function isNumber(n) {
        return !isNaN(parseFloat(n)) && isFinite(n);
    }

    //Apply cap a value at a high or low number
    function CapValue(valueToCap, maxValue, minValue) {
        if (isNumber(maxValue)) {
            if (valueToCap > maxValue) {
                return maxValue;
            }
        }
        if (isNumber(minValue)) {
            if (valueToCap < minValue) {
                return minValue;
            }
        }
        return valueToCap;
    }

    function getDecimalPlaces(num) {
        var numberOfDecimalPlaces;
        if (num % 1 != 0) {
            return num.toString().split(".")[1].length
        } else {
            return 0;
        }

    }

    function mergeChartConfig(defaults, userDefined) {
        var returnObj = {};
        for (var attrname in defaults) {
            returnObj[attrname] = defaults[attrname];
        }
        for (var attrname in userDefined) {
            returnObj[attrname] = userDefined[attrname];
        }
        return returnObj;
    }

    //Javascript micro templating by John Resig - source at http://ejohn.org/blog/javascript-micro-templating/
    var cache = {};

    function tmpl(str, data) {
        // Figure out if we're getting a template, or if we need to
        // load the template - and be sure to cache the result.
        var fn = !/\W/.test(str) ?
            cache[str] = cache[str] ||
                tmpl(document.getElementById(str).innerHTML) :

            // Generate a reusable function that will serve as a template
            // generator (and which will be cached).
            new Function("obj",
                "var p=[],print=function(){p.push.apply(p,arguments);};" +

                // Introduce the data as local variables using with(){}
                "with(obj){p.push('" +

                // Convert the template into pure JavaScript
                str
                    .replace(/[\r\t\n]/g, " ")
                    .split("<%").join("\t")
                    .replace(/((^|%>)[^\t]*)'/g, "$1\r")
                    .replace(/\t=(.*?)%>/g, "',$1,'")
                    .split("\t").join("');")
                    .split("%>").join("p.push('")
                    .split("\r").join("\\'")
                + "');}return p.join('');");

        // Provide some basic currying to the user
        return data ? fn(data) : fn;
    };
}


